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- /*=============================================================================
- Copyright (c) 2001-2015 Joel de Guzman
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- =============================================================================*/
- #include <boost/detail/lightweight_test.hpp>
- #include <boost/spirit/home/x3.hpp>
- #include <string>
- #include <cstring>
- #include <iostream>
- #include "test.hpp"
- int
- main()
- {
- using spirit_test::test_attr;
- using spirit_test::test;
- using namespace boost::spirit::x3::ascii;
- using boost::spirit::x3::rule;
- using boost::spirit::x3::lit;
- using boost::spirit::x3::unused_type;
- using boost::spirit::x3::_attr;
- { // context tests
- char ch;
- auto a = rule<class a, char>() = alpha;
- // this semantic action requires the context
- auto f = [&](auto& ctx){ ch = _attr(ctx); };
- BOOST_TEST(test("x", a[f]));
- BOOST_TEST(ch == 'x');
- // this semantic action requires the (unused) context
- auto f2 = [&](auto&){ ch = 'y'; };
- BOOST_TEST(test("x", a[f2]));
- BOOST_TEST(ch == 'y');
- // the semantic action may optionally not have any arguments at all
- auto f3 = [&]{ ch = 'z'; };
- BOOST_TEST(test("x", a[f3]));
- BOOST_TEST(ch == 'z');
- BOOST_TEST(test_attr("z", a, ch)); // attribute is given.
- BOOST_TEST(ch == 'z');
- }
- { // auto rules tests
- char ch = '\0';
- auto a = rule<class a, char>() = alpha;
- auto f = [&](auto& ctx){ ch = _attr(ctx); };
- BOOST_TEST(test("x", a[f]));
- BOOST_TEST(ch == 'x');
- ch = '\0';
- BOOST_TEST(test_attr("z", a, ch)); // attribute is given.
- BOOST_TEST(ch == 'z');
- ch = '\0';
- BOOST_TEST(test("x", a[f]));
- BOOST_TEST(ch == 'x');
- ch = '\0';
- BOOST_TEST(test_attr("z", a, ch)); // attribute is given.
- BOOST_TEST(ch == 'z');
- }
- { // auto rules tests: allow stl containers as attributes to
- // sequences (in cases where attributes of the elements
- // are convertible to the value_type of the container or if
- // the element itself is an stl container with value_type
- // that is convertible to the value_type of the attribute).
- std::string s;
- auto f = [&](auto& ctx){ s = _attr(ctx); };
- {
- auto r = rule<class r, std::string>()
- = char_ >> *(',' >> char_)
- ;
- BOOST_TEST(test("a,b,c,d,e,f", r[f]));
- BOOST_TEST(s == "abcdef");
- }
- {
- auto r = rule<class r, std::string>()
- = char_ >> *(',' >> char_);
- s.clear();
- BOOST_TEST(test("a,b,c,d,e,f", r[f]));
- BOOST_TEST(s == "abcdef");
- }
- {
- auto r = rule<class r, std::string>()
- = char_ >> char_ >> char_ >> char_ >> char_ >> char_;
- s.clear();
- BOOST_TEST(test("abcdef", r[f]));
- BOOST_TEST(s == "abcdef");
- }
- }
- return boost::report_errors();
- }
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